The Emerald™ dome optical system designed to produce aberration-free images with pinpoint stars all the way to the edge of the field of view.

Emerald™ optics virtually eliminates off-axis star coma, provide an exceptional-quality system at a fraction of the price of competitors.

A DIFFERENCE YOU CAN SEE

Compare the two images* of a star field below. The first was taken with a competing optical design, the second with Emerald™ Dome Lenses optics. Superior edge performance not only creates rounder, more pleasing stars, but actually improves the resolution and audience experience. With Emerald™ MgF2 optical coatings, our optics gives you maximum light throughput across the widest visual spectrum.

Fig. 1: The competing design, when focused on the axis, shows sharp stars in the center of the image, but dramatically out-of-focus stars (rings or lines) at the edges.

When focused on-axis, both images appear to be sharp in the center. But in the first image, as you examine the stars closer and closer to the edge, the stars become larger and less focused. Finally, at the very corners, the stars are so defocused that they appear smeared instead of pinpoints.

Now look at the second image. As you move from the center outward, the stars retain their focus from edge to edge, appearing as crisp, solid points of light.

IMPROVED PERFORMANCE FOR BRIGHTER, MORE DETAILED IMAGES

Superior edge performance not only creates rounder, more pleasing stars, but actually improves the resolution and limiting magnitude compared to projection units of equal initial properties/specs.

Emerald™'s high definition optics let you resolve smaller spot sizes all the way to the outer edge, revealing finer detail and greater contrast.